diff --git a/requirements.txt b/requirements.txt
index d6ca46c4..48b457d1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ pytest==8.3.2
 pytest-cov==5.0.0
 flake8==7.1.1
 requests-mock==1.12.1
-Sphinx<8
+Sphinx<9
 sphinx_rtd_theme==2.0.0
 lxml==5.2.2
 requests==2.32.3